Efforts continue to improve the Modeling of Thrusters
MARIN uses thrusters in many projects. For a typical model scale, around 1:50 to 1:60, relatively small thrusters are required. Thrusters for these models are available ranging from 50 mm to 80 mm nozzle diameters. In the past these thrusters were always modelled with a horizontal shaft.
By tilting the nozzle, the closest possible match was achieved between the client specifications and the modelled thruster for the basin tests.
Due to the ever-evolving process in improving the models, new thrusters were built witha 7-degree tilted thruster shaft.
Special gears were made for a reliable and durable thruster model and with these new thrusters it is still possible to mount nozzles with a slightly different angle. See figures for examples.
The newly built thrusters give clients the ability to choose a more accurate representation of the thrusters used during model testing.
Robert Heerkink is project manager at the Ships department of MARIN, the Maritime Research Institute Netherlands. MARIN offers simulation, model testing, full-scale measurements and training programs, to the shipbuilding and offshore industry and governments.
(As published in the September edition of Maritime Reporter & Engineering News - www.marinelink.com)
Other stories from September 2013 issue
- Shale Oil Is it a Threat to Future Deepwater Development? page: 12
- ZF Marine Propulsion Systems page: 14
- Interview: MAN Diesel & Turbo Head of R&D, Søren H. Jensen, page: 18
- Efforts continue to improve the Modeling of Thrusters page: 24
- GPS Spoofing and the Potential Perils to Ships at Sea page: 26
- Mitigation of Shock & Vibration on Fast Boats page: 30
- LNG Capital Expenditure page: 34
- Safety in Numbers page: 38
- Poland’s Maritime U. page: 40
- Back to School page: 48
- Pick Me Up page: 52
- Liebherr Wins Significant Ship Crane Order page: 54
- BAE Yards Busy with PSV Newbuilds, Ship Repairs page: 58
- The Ties that Bind page: 60
- Floating Production Systems: A Big Opportunity for Shipyards page: 62
- Kirby Corp. CEO Joe Pyne is "No Ordinary Joe" page: 68
- Bollinger Builds page: 78
- Conrad Shipyard: Strength in Diversity page: 82
- SCANIA Powers Ahead in Workboat Market page: 84
- MAN Diesel & Turbo and the Tier-III Age page: 86
- Offshore Service Vessels page: 94
- W&O Expands Repertoire page: 98
- Tech Profile: Colfax CM-1000 page: 102
- A “Look Under the Hood” page: 106
- Beier Radio page: 108
- Carnival to Develop New Emission Reduction Tech page: 110
- Fire Protection for LNG-fueled Ships page: 118
- A Shipyard First Bug-O System’s Heavy-Duty MDS and Hardcoat Anodized Rail page: 120